Propane spectral resolution enhancement by the maximum entropy method
| Autor: | R. Inguva, Kenneth P. Stewart, E. J. Hurley, N. L. Bonavito, K. C. Yeh |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
business.industry Materials Science (miscellaneous) Principle of maximum entropy Fast Fourier transform Resolution (electron density) Michelson interferometer Spectral density Spectral density estimation Industrial and Manufacturing Engineering law.invention Optics law Astronomical interferometer Business and International Management Spectral resolution business |
| Zdroj: | Applied optics. 29(13) |
| ISSN: | 1559-128X |
| Popis: | The Burg algorithm for maximum entropy power spectral density estimation is applied to a time series of data obtained from a Michelson interferometer and compared with a standard fast Fourier transform (FFT) estimate for resolution capability. The propane transmittance spectrum was estimated by use of the FFT with a 2(18)-data sample interferogram, giving a maximum unapodized resolution of 0.06 cm(-1). This estimate was then interpolated by zero filling an additional 2(18) points, and the final resolution was taken to be 0.06 cm(-1). Comparison of the maximum entropy method (MEM) estimate with the FFT was made over a 45-cm(-1) region of the spectrum for several increasing record lengths of interferogram data beginning at 2(10). It is found that over this region of 45 cm(-1), the MEM estimate with 2(16) data samples is in close agreement with the FFT estimate using 2(18) samples. |
| Databáze: | OpenAIRE |
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